Start up, to taxy, seems to take for ever for an Albert, I'm sure there must be a technical reason why it takes so long.
It takes about 10 mins to run the checks from starting the APU to taxi, covering engine start (approx. 1 min each), anti-icing (with engines run at 100% to provide sufficient bleed air for the check), stall protection & autopilot checks. Not unduly long but I guess a bit longer than a jet which starts its engines as its pushed back & is probably ready to taxy a wee bit sooner.
But as the jets are just whispering at idle compared to the props thrashing around, even at 70% (low-speed ground idle), it probably just seems longer to bystanders........